CN102196111B - Short-wave two-path modulator-demodulator - Google Patents
Short-wave two-path modulator-demodulator Download PDFInfo
- Publication number
- CN102196111B CN102196111B CN201110093188.5A CN201110093188A CN102196111B CN 102196111 B CN102196111 B CN 102196111B CN 201110093188 A CN201110093188 A CN 201110093188A CN 102196111 B CN102196111 B CN 102196111B
- Authority
- CN
- China
- Prior art keywords
- unit
- data
- psk
- demodulator
- way
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007493 shaping process Methods 0.000 claims abstract description 17
- 230000005764 inhibitory process Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 238000004891 communication Methods 0.000 abstract description 6
- 230000001629 suppression Effects 0.000 abstract 2
- 230000010363 phase shift Effects 0.000 abstract 1
- 238000005070 sampling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
Images
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention discloses a short-wave two-path modulator-demodulator, which comprises two paths of modulators and two paths of demodulators, wherein in the two paths of modulators, one path of modulator comprises a convolution code unit, a first waveform generating unit, a first phase shift keying (PSK) modulation unit and a first waveform shaping unit, which are connected in sequence; the other path of modulator comprises a data modulation unit, a second waveform generating unit, a second PSK modulation unit and a second waveform shaping unit, which are connected in sequence; in the two paths of demodulators, one path of demodulator comprises a low-pass filter unit, a first interference suppression unit, a first time domain equalization unit, a first PSK demodulation unit and a first convolution decoding unit, which are connected in sequence; and the other path of demodulator comprises a band-pass filter unit, a second interference suppression unit, a second time domain equalization unit, a second PSK demodulation unit and a second convolution decoding unit, which are connected in sequence. According to the short-wave two-path modulator-demodulator, the rate is improved, namely under the condition of certain channel quality, the communication data transmission rate is doubled. The short wave two-path modulator-demodulator has the advantages of improved performance, good compatibility, multiple functions and wide application scope.
Description
Technical field
The present invention relates to wireless data communication technology, be mainly used in HF digital communication radio station, relate in particular to a kind of shortwave two-way modulator-demodulator.
Background technology
Transfer of data is mainly carried out in existing military, civilian HF digital communication radio station in audio bandwidth.On transmission rate and transmission quality, owing to being subject to the restriction of 3k audio bandwidth, more and more can not meet the demand of application, can not meet especially the transmission demand of the mass data such as image, transmission of video.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of shortwave two-way modulator-demodulator for the deficiencies in the prior art.Adopt following technical scheme:
A shortwave two-way modulator-demodulator, adopts two-way parallel channel to carry out transfer of data.
Described shortwave two-way modulator-demodulator, described two-way parallel channel comprises two-way modulator and two-way demodulator, in described two-way modulator, a road comprises convolution code unit, the first wave generating unit, a PSK modulating unit and the first waveform shaping unit connecting in turn; Another road comprises Data Modulation unit, the second wave generating unit, the 2nd PSK modulating unit and the second waveform shaping unit connecting in turn; In described two-way demodulator, a road comprises that the low-pass filter unit, first connecting in turn disturbs inhibition unit, the first time domain equalization unit, a PSK demodulating unit, the first convolution decoding unit; Another road comprises that the bandpass filtering unit, second connecting in turn disturbs inhibition unit, the second time domain equalization unit, the 2nd PSK demodulating unit, the second convolution decoding unit.
The present invention mainly contains following beneficial effect:
Speed improves: in the situation that channel quality is certain, the message transmission rate of communication is doubled.
Performance improves: in the situation that message transmission rate is the same, the interference free performance of transfer of data is doubled.
Compatible: the transfer of data system that each channel adopts active service radio station, can realize intercommunication with the transfer of data in active service radio station.
Diverse in function: two channels carry out independent modulation /demodulation to data respectively, can, by the transmittability Integrated using of two channels, also can be used respectively two channels, such as realizing simultaneous data and speech transmission.
Be widely used: can be suitable for various domestic and international short-wave radio sets.
Improving performance: by improving the communication performance of single channel, can improve exponentially the performance of two-way modulator-demodulator.
Accompanying drawing explanation
Fig. 1 is transmitting terminal transmission flow figure of the present invention;
Fig. 2 is that receiving terminal of the present invention receives flow process;
Fig. 3 is XD-D12V short-wave radio set illustraton of model of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
Two-way modulator-demodulator adopts two-way parallel channel to carry out transfer of data.
Total channel width is 7kHz, is divided into 2 adjacent 3kHz channels, and two interchannels retain the protection interval of 600Hz.
Each channel width 3kHz, adopts " 15 " serial short-wave radio set transfer of data system.Transmit respectively 75,150,300,600,1200 and 2400bps data, total speed reaches 150,300,600,1200,2400 and 4800bps.
According to sampling thheorem, the baseband sampling rate of two-way modulator-demodulator is 19.2kbps, and its nyquist frequency is 9.6kbps.
Baseband waveform adopts square root raised cosine forming filter to carry out waveform shaping.
By low pass filter and band pass filter, realize the separated of baseband signal.The passband of low pass filter is 0Hz～3300Hz, and the passband of band pass filter is 3900Hz～6900Hz.
The data allocations that adopts Data Division agreement that needs are sent is carried out respectively modulation system to two channels.Two channel demodulations of recipient go out after data, by data fusion agreement, data are reduced.
Embodiment 2
Shortwave two-way modulator-demodulator, comprises two-way modulator and two-way demodulator; In described two-way modulator, a road comprises convolution code unit, the first wave generating unit, a PSK modulating unit and the first waveform shaping unit connecting in turn; Another road comprises Data Modulation unit, the second wave generating unit, the 2nd PSK modulating unit and the second waveform shaping unit connecting in turn; In described two-way demodulator, a road comprises that the low-pass filter unit, first connecting in turn disturbs inhibition unit, the first time domain equalization unit, a PSK demodulating unit, the first convolution decoding unit; Another road comprises that the bandpass filtering unit, second connecting in turn disturbs inhibition unit, the second time domain equalization unit, the 2nd PSK demodulating unit, the second convolution decoding unit.
At transmitting terminal, as shown in Figure 1, data to be sent split according to Data Division agreement process in Data Division unit, form two paths of data, entering respectively two-way modulator modulates: data are carried out code interleaving by convolutional encoding unit, and the coded-bit of output is in channel separately.Transmitting procedure is as follows: first synchronous head produces synchronous code through the first wave generating unit, the second wave generating unit; Coded-bit enters the first wave generating unit, the second wave generating unit, in the first wave generating unit, the second wave generating unit, carry out scrambler and insert after frequency pilot sign, output to a PSK modulating unit, PSK modulation is carried out in the 2nd PSK modulating unit unification, after PSK modulation, move in corresponding carrier frequency, at the first waveform shaping unit, the second waveform shaping unit, carry out respectively waveform shaping.The laggard up-conversion of two-way baseband signal aliasing unit after shaping carries out up-conversion, enters afterwards radio frequency unit and sends.
At receiving terminal, as shown in Figure 2, the baseband signal that intermediate frequency data produces after down-converter unit enters respectively two-way demodulator and carries out demodulation process: low pass filter and band pass filter through 3k broadband carry out after filtering, remove again this road carrier wave, in the first interference, suppressing unit, second respectively disturbs inhibition unit to complete after interference inhibition, carry out again signal identification and synchronous, at data phase, carry out following operation, first enter the first time domain equalization unit, the second time domain equalization unit carries out time domain equalization; Then enter a PSK demodulating unit, the 2nd PSK demodulating unit carries out PSK demodulation; Then enter the first convolution decoding unit, the second convolution decoding unit carries out folding coding, last in Data Integration unit, by data reduction agreement, the order of demodulation data is out adjusted.
As shown in Figure 3, be that two-way modulator-demodulator of the present invention obtains practicing schematic diagram on short-wave radio set XD-D12V, according to the channel requirement of XD-D12V short-wave radio set, the intermediate frequency carrier of two-way modulator-demodulator is 20KHz, sampling rate 614.4Kbps.Down-conversion DDC produces baseband signal intermediate-freuqncy signal after mixing, extraction, and corresponding numeric code rate becomes 19.2Kbps from 614.4Kbps, and total extraction yield is 32.Up-conversion DUC up-converts to intermediate-freuqncy signal by the baseband signal of 19.2Kbps through interpolation, mixing, and corresponding numeric code rate becomes 614.4Kbps from 19.2Kbps, 32 times of interpolation.
XD-D12V short-wave radio set is after application two-way modulator-demodulator, and message transmission rate realizes 150,300,600,1200,2400 and 4800bps.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (1)
1. a shortwave two-way modulator-demodulator, it is characterized in that, adopt two-way parallel channel to carry out transfer of data, described two-way parallel channel comprises two-way modulator and two-way demodulator, in described two-way modulator, a road comprises convolution code unit, the first wave generating unit, a PSK modulating unit and the first waveform shaping unit connecting in turn; Another road comprises Data Modulation unit, the second wave generating unit, the 2nd PSK modulating unit and the second waveform shaping unit connecting in turn; In described two-way demodulator, a road comprises that the low-pass filter unit, first connecting in turn disturbs inhibition unit, the first time domain equalization unit, a PSK demodulating unit, the first convolution decoding unit; Another road comprises that the bandpass filtering unit, second connecting in turn disturbs inhibition unit, the second time domain equalization unit, the 2nd PSK demodulating unit, the second convolution decoding unit; At transmitting terminal, data to be sent split according to Data Division agreement process in Data Division unit, form two paths of data, enter respectively two-way modulator and modulate: data are carried out code interleaving by convolutional encoding unit, the coded-bit of output is in channel separately; Transmitting procedure is as follows: first synchronous head produces synchronous code through the first wave generating unit, the second wave generating unit; Coded-bit enters the first wave generating unit, the second wave generating unit, in the first wave generating unit, the second wave generating unit, carry out scrambler and insert after frequency pilot sign, output to a PSK modulating unit, PSK modulation is carried out in the 2nd PSK modulating unit unification, after PSK modulation, move in corresponding carrier frequency, at the first waveform shaping unit, the second waveform shaping unit, carry out respectively waveform shaping; The laggard up-conversion of two-way baseband signal aliasing unit after shaping carries out up-conversion, enters afterwards radio frequency unit and sends; At receiving terminal, the baseband signal that intermediate frequency data produces after down-converter unit enters respectively two-way demodulator and carries out demodulation process: low pass filter and band pass filter through 3k broadband carry out after filtering, remove again this road carrier wave, in the first interference, suppressing unit, second respectively disturbs inhibition unit to complete after interference inhibition, carry out again signal identification and synchronous, at data phase, carry out following operation, first enter the first time domain equalization unit, the second time domain equalization unit carries out time domain equalization; Then enter a PSK demodulating unit, the 2nd PSK demodulating unit carries out PSK demodulation; Then enter the first convolution decoding unit, the second convolution decoding unit carries out folding coding, last in Data Integration unit, by data reduction agreement, the order of demodulation data is out adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110093188.5A CN102196111B (en) | 2011-04-14 | 2011-04-14 | Short-wave two-path modulator-demodulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110093188.5A CN102196111B (en) | 2011-04-14 | 2011-04-14 | Short-wave two-path modulator-demodulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102196111A CN102196111A (en) | 2011-09-21 |
| CN102196111B true CN102196111B (en) | 2014-05-07 |
Family
ID=44603464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110093188.5A Active CN102196111B (en) | 2011-04-14 | 2011-04-14 | Short-wave two-path modulator-demodulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102196111B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471801B (en) * | 2015-12-02 | 2018-11-20 | 中国电子科技集团公司第四十一研究所 | A kind of 5G mobile communication digital modulation signal occurrence device and its method for generation |
| RU172898U1 (en) * | 2017-02-27 | 2017-07-31 | Акционерное общество "Концерн "Созвездие" | PARALLEL RADIO MODEM |
| CN111711586B (en) * | 2020-06-15 | 2021-07-13 | 吉林大学 | Time-frequency collaborative filtering method and system applied to communication modulation mode identification |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405987A (en) * | 2001-08-07 | 2003-03-26 | 许继集团有限公司 | Single-double-path modulation and demodulation method, and singl-double-path modem thereof |
| CN101340207A (en) * | 2008-08-07 | 2009-01-07 | 清华大学 | Ultra-wideband receiving method based on sub-band parallel sampling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1649651A1 (en) * | 2003-04-08 | 2006-04-26 | ACN Advanced Communication Networks SA | Method and apparatus for channel equalization in multi-carrier communication devices using discrete cosine modulated filter bank or wavelet packet modulation |
-
2011
- 2011-04-14 CN CN201110093188.5A patent/CN102196111B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405987A (en) * | 2001-08-07 | 2003-03-26 | 许继集团有限公司 | Single-double-path modulation and demodulation method, and singl-double-path modem thereof |
| CN101340207A (en) * | 2008-08-07 | 2009-01-07 | 清华大学 | Ultra-wideband receiving method based on sub-band parallel sampling |
Non-Patent Citations (2)
| Title |
|---|
| 何纬.短波通信中的调制解调技术.《西安电子科技大学》.2008,全文. |
| 短波通信中的调制解调技术;何纬;《西安电子科技大学》;20080101;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102196111A (en) | 2011-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103401613B (en) | A kind of Techniques Used in Digital Microwave Transmission device and method | |
| CN101621326B (en) | Downlink multi-access transmission system and implementation device thereof | |
| US20160198472A1 (en) | Transmit End, Receive End, and Method for Coexistence of Single Carrier System and Multicarrier System | |
| CN105049076B (en) | software radio communication method and system | |
| CA2810434C (en) | Method and apparatus for transmitting cpri signal by means of coaxial line | |
| CN113141212B (en) | Control word and I/Q waveform synchronous transmission method and device for mobile forward transmission | |
| CN102196111B (en) | Short-wave two-path modulator-demodulator | |
| CN111954280A (en) | Broadband carrier and wireless dual-mode communication switching method, system and device | |
| CN102625089A (en) | Video wireless transmission system based on ultra wideband technology | |
| US7068649B2 (en) | Extended bandwidth homePNA system compatible with homePNA 2.0 | |
| CA2652602A1 (en) | Communication system | |
| CN105429911B (en) | Without time and no frequency guard bands wireless multi-carrier communications method and device | |
| CN108123724B (en) | Communication system based on short wave narrow-band waveform | |
| CN111225360B (en) | Narrow-band wireless communication system and method | |
| CN107211480B (en) | Distributed base station and signal transmission method | |
| RU98119313A (en) | RADIO COMMUNICATION SYSTEM BETWEEN ONE AND MULTIPLE ITEMS | |
| CN201435791Y (en) | Bidirectional digital audio wireless mobile video transmission device | |
| CN105100968A (en) | Digital intercom system based on MPPSK (M-ary Phase Position Shift Keying) modulation | |
| CN105471801A (en) | 5G mobile communication digital modulating signal generation device and generation method thereof | |
| US20040109497A1 (en) | Communications system including a narrow band demodulator | |
| CN208257825U (en) | Distributed channel system | |
| CN109639609A (en) | Multi tate Multiple modulation mode commercialization number based on CCSDS transmission structure passes emitter | |
| CN108989251A (en) | A kind of communication system based on shortwave narrowband waveform | |
| CN109981133B (en) | Unmanned marine wireless broadband radio station | |
| US20070147486A1 (en) | Signal processing within a wireless modem |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: SHAANXI FENGHUO COMMUNICATION GROUP Co.,Ltd. Person in charge of patents Document name: payment instructions |